Valve



'(NOMOdeI.) A

E. RTOMLINSON.

VALVE.

No. 305,722. Patented Sept. 23, 1884.

UNITED STATES PATENT CEEICE.

E'DVIN It. TOMLINSON, OF VEST STRATFCRD, CONNECTICUT.

VALVE.

SPECIFICATION forming part of Letters Patent No. 305,722, datedSeptember 23, 1884.

Application filed March 13, 1884. (No model.)

To cl/ZZ whom t may concern:

Be it known that I, EDWIN R. ToMLrNsoN, a citizen of the United States,residing at West Stratford, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inValves; and I do hereby declare the following to be a full, clear, andexact descriptionof the invention, such as will enable others skilled inthe art to which it appertains `to make and use the same.

My invention relates to certain novel and useful improvements in valves,but more especially to that particular class of valves known asclack-valves,77 and has for its object to so construct and arrange adeviceof this description that any irregular wear on the packing or seatshall be compensated for; and with this end in view my inventionconsists in the `details of construction and combination of elementshereinafter fully and in detail explained, and then specificallydesignated by the claims.

In order that those skilled in the art to which my invention appertainsmay more fully understand its construction and operation, I will proceedto describe the same, referring by letter to the accompanying drawings,forming a part of this specification, in which- Figure l is a detailperspective view showing the valve pivoted to the yoke, and Fig. 2 aicentral vertical section of my improved valve in operative position.

Similar letters denote like parts in both figures of the drawings.

A is the casing, and B the valve-seat arranged therein. Cis a yokeadapted to surround the seat, and D the valve pivoted to said yoke', asshown at Fig. l.

E is a fork projecting upwardly from the rear of the yoke, and F is apin or projection secured to or cast integral with the cap G, andadapted to extend within the fork when the several parts are in theirproper operative position, as clearly seen at Fig. 2. In devices of thisdescription the valve has been pivoted to the casing, and the wear onthe packing or My improvement is applicable to horizontal and verticalvalves, and overcomes this diffi-4 culty, since the yoke is free to movealong the extension of the valve-seat, and as fast as the seat becomesworn away the valve will be automatically adapted to close on said seatclosev ly, because its normal position will have been changed, owing tothe dropping of the yoke, if in a vertical valve, or the slidingbackward ofthe same, if a horizontal valve. When the valve is raised,the yoke will drop down slightly or slide backward, as the case may be,and at the closing of the valve the weight of the latter or t-hesteam-pressure will cause the yoke to be returned to its normalposition. The ralative position of the pin and fork prevents the yokefrom wabbling or having any unsteady movement. i

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In a valve as described, a yoke extending around the valve-seat, andhaving a free play longitudinally thereof, in combination 4with thevalve pivoted at the rear of said yoke, substantially as set forth.

2. In a valve as described, the yoke having' at its rear end a forkprojection, and adapted to surround the seat, and having the valvepivoted thereto, in combination with the cap provided with a pin adaptedto project within Y said fork,` substantially as hereinbefore shown andset forth.

In testimony-whereofl affix my signature in presence of two witnesses.

EDWIN It. TOMLINSON.

Witnesses S. S. WILLIAMsoN, W. T. HAvILANn.

